actually, as far as finding a 0% balance transfer offer, you can just call up one of your existing credit cards and threaten to cancel. in almost every case, the very first thing they will offer you is a 0% balance transfer to pay off some other card or balance.
this can be a damaging game to play, though. your credit will show an artificially high balance of revolving accounts owe. technically speaking, this will lower your credit, but if you're not worried about getting new loans at the time, this is a good way to save some cash if you're willing to put in the careful effort to manage things.